問題詳情
1.關於X染色體脆折症（fragile X syndrome）的敘述，下列何者正確？
(A)患者以女性為主，通常具有家族史
(B)此類患者的Rb基因出現三核苷酸 AAT重複次數有異常擴增的現象
(C)與唐氏症（Down syndrome）患者不同，Ｘ染色體脆折患者通常智力正常
(D)患者特徵為長而窄的臉部、突出的下顎、大耳朵及二尖瓣脫垂等現象
(A)患者以女性為主，通常具有家族史
(B)此類患者的Rb基因出現三核苷酸 AAT重複次數有異常擴增的現象
(C)與唐氏症（Down syndrome）患者不同，Ｘ染色體脆折患者通常智力正常
(D)患者特徵為長而窄的臉部、突出的下顎、大耳朵及二尖瓣脫垂等現象
參考答案
無參考答案
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